9815380144 has 20 divisors (see below), whose sum is σ = 19019777200. Its totient is φ = 4907050560.

The previous prime is 9815380139. The next prime is 9815380153. The reversal of 9815380144 is 4410835189.

It is a self number, because there is not a number n which added to its sum of digits gives 9815380144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101914 + ... + 173254.

It is an arithmetic number, because the mean of its divisors is an integer number (950988860).

Almost surely, 2^9815380144 is an apocalyptic number.

It is an amenable number.

9815380144 is a deficient number, since it is larger than the sum of its proper divisors (9204397056).

9815380144 is a wasteful number, since it uses less digits than its factorization.

9815380144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79948 (or 79942 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 9815380144 is about 99072.6003696279. The cubic root of 9815380144 is about 2141.0938699763.

The spelling of 9815380144 in words is "nine billion, eight hundred fifteen million, three hundred eighty thousand, one hundred forty-four".